The analog input range for the part can be selected to be a 0 V to VREF range or a 2VREF range with either straight binary or twos complement output coding. The AD7266 has an on-chip 2.5 V reference that can be overdriven if an external reference is preferred. This external reference range is 100 mV to 2.5 V. The AD7266 is available in 32-lead lead frame chip scale (LFCSP) and thin quad flat (TQFP) packages.